Valve for multiple-cylinder engines



(No Model.)

B. B-ENHAM. VALVE FOR MULTIPLE GYLINDER ENGINES.

No. 380,849. Patented Apr. 10, 1888.

llNrTsD STATES FFTC Q PATENT VALVE FOR MULTlPLE-CYLINDER ENGINES.

SPECIFICATION forming part of Letters Patent No. 380,849, dated April 10, 1888.

Application filed August 29, 1887. Serial No. 248,142. (No model.)

To aZZ whom it may concern:

Be it known that I, ELIJAI-I B. BENHAM, a citizen of the United States, residing at Holyoke, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Valves for MultipleCylinder Motors, of which the following is a specification.

This invention relates to valves for multiplecylinder motors, the object being to provide an improved valve for said class of motors for governing the entrance of water, steam, or other motor element to the cylinders thereof, and providing for the exit of said elements from said cylinders; and the invention consists in the peculiar construction of said valve, all as hereinafter fully'described, and pointed out in the claim.

In the drawings forming part of this specification, Figure l is a perspective view of a motor'valve constructed according to my in vention. Fig. 2 is a longitudinal section of said valve. Fig. 3 is a perspective view of that part of the cylinder-head of a motor in connection with which the open end of said valve operates. Fig. 4 is a vertical section of the main portion of the valve-case of the motor and one end of the same, in which said valve is used, the intermediate portion being shown in dotted lines, showing the valve in side elevation therein, said figure showing also the main portion of the drivingshaft extending through the valve and a section of a portion of the cylinder-head of the motor.

In the drawings, A is the valve, constructed, preferably, from brass or composition metal, and is of cylindrical form, excepting its front bearing end, 6, which is semicircular. In said front end is formed an annular chamber, 10, which is adapted to receive the tubular projection y on the inner side of that part of the motor-head it (see Fig. 3) surrounding the shaft-hole therethrough. In practice the drivingshaft 12 of the motor passes through the said tubular projection 3 on the side of the head h of the motor, and the valve A is placed on and connected to said shaft, and hence rotates with it; and so arranged the border 2 and surfaces 3 of the end e of the valve have a bearing on that part of the head of the motor which surrounds said tubular projection y, in which are the ports a or ends of the passages which the end of the valve bears.

which lead to the several cylinders of the motor, and through which steam or Water passes to and from said cylinders.

Fig. 4 illustrates the position of the valve A in its case 13, in which figure is also shown the central portion of the cylinder-head h, against Said case 13 has a chamber, 0, therein, with which the inlet-passage l5 communicates, through which steam or water flows into said chamber, and

from thence into such ports 4 in the head as may not be covered by the open end 6 of the valve and surfaces 3 on said end. A second chamber, n, is formed in the valve-case 13, which receives the exhaust steam or water from the interior of the valve A through the ports 10 in the side thereof, said exhaust-chamber communicating with the exhaust-passage a through one side of the case. A sleevenut, 14, is screwed into the valvecase 13, encircling the valve back of its head, and has one end engaging a shoulder on the valve, as shown, whereby the valve is adjusted longitudinally toward and from its bearing-surface on the cylinder-head it. An opening, 1;, is made through one side of the case 13, opposite the edge of the flange on said sleeve-nut, to permit an instrument to be inserted for turning said nut in order to adjust the valve, as aforesaid, said opening 1) being plugged or closed. in any suitable manner while the motor is in operation. That part of the valve which extends rearwardly beyond the case 13 is in closed by a suitable case, as indicated by dotted lines in Fig. 4 at 17, and such further extension, 16, as may be necessary.

The said projection 3 serves, independently of the motorshaft, to steady the said bearing end e of the valve, keeping the valve in line and condncing to retain its said end 6 in such position that its bearing-surfaces 2 and 3 are held invariably in the same plane with the adjoining side of the motor-head, against which the said end of the valve rotates, thereby avoiding a certain displacement of the bearing end of the valve relative to said side of the motorhead, which has heretofore occurred more or less when the valve is held in line solely by the driving-shaft. By said engagement of the end of the valve with the head of the motor the position of the valve remains the same if the shaft by wear gets somewhat out of line,

It will be seen from the semicircular form of the bearing end of the valve that it can cover only a portion of said ports 4 in the head h, and while a portion of said ports are so covered water or steam flows past the beveledoffside 5 of the end of the valve into the exposed ports, and the exhaust water or steam from the cylinders flows into the open end 6 of the valve.

The shaft 12 of the motor, as aforesaid, passes through the valve, having a bearing therein at 7 and 8. A cylindrical chamber, 9, is formed in the valve, the inner Walls of which are sufliciently removed from the sides of the shaft which passes through it to permit water or steam which enters said open end 6 of the valve to pass around a shaft within said chamber 9 and flow through the escape-ports 10 in the sides of the valve which surround said chamber, and thence off through any convenient passage in the valve-case of the motor.

What I claim as my invention is- A valve for multiple cylinder motors of substantially cylindrical form, having a semicircular open bearing end, as described, an 25 annular chamber, w, in said end, to receive a tubular projection on a motor, a chamber, 9, communicating with said open end of the valve, and an exhaust port or ports, 10, through the sides of that part of the valve surrounding 30 said chamber 9, substantially as described.

ELIJAH B. BENHAM.

Witnesses:

G. M. CHAMBERLAIN, H. A. CHAPIN. 

